1. Section 1, Periodontology, Oral Microbiology, and Community Dentistry; Department of Odontology; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
2. Department of Immunology & Microbiology; University of Copenhagen; Copenhagen Denmark
3. Section 1, Oral Medicine, Clinical Oral Physiology, Oral Anatomy and Pathology; Department of Odontology; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
4. Department of Microbiology; The Forsyth Institute; Cambridge MA USA
5. Department of Oral Medicine, Infection & Immunity; Harvard School of Dental Medicine; Boston MA USA